davidphemi
New Member
i am designing a 12vdc,200mA transformerless power supply using in4007(diode) for rectification,a ceramic capacitor 475k and 10R resistor for limitting,a zener diode (in4742A) for a regulated output.after the connections, the 12Vdc was gotten but am not still getting the output current, the transformerless power supply is needed to drive a relay of 12vdc 160mA..
Vsource=220VAC
Freq=50Hz
Vsource=220VAC
Freq=50Hz